P4312 - CNID informed from header form problem

Hello!

We have a problem using standard P4312 if we want to fill in CNID from the header form instead grid level.

If the CNID field is filled in each line at the grid level, this information is saved and updated in the master table F4311. However, if we used the form it doesn't work, the information is not saved in F4311 and therefore it is not available to be consulted in the P43214 (many times It is really usefull to filter datas in P43214.

What can it be happen?

This functionallity is very important for the business logic and work process not only the information but also to save time in this process. We usually have PO with hundreds of lines and filled in CNID manually is a long time wasted.